I’d imagine Twilight would be fascinated by fusion, and with her magical girl abilities, could possibly be able to fuse with Pearl. I’d imagine they’d get along great despite minor setbacks with Twilight, well… being unable to dance AT ALL.
 
“Like a crisp, dark winter sky, Iolite, in shifting shades of violet-blue carries the spirit of journey, of dreams and intuition, of exploration and illumination. It is known as the Vikings’ Compass, and provides the vision to move us, physically and spiritually, from one realm to the next.
 
It strengthens the resolve to take on responsibility and carry through, and provides self-assurance and endurance in adverse situations. Iolite resonates with the energy of twilight, a beautiful violet-blue that stimulates the astral bodies and psychic awareness.”